Lull mattresses are CertiPUR-US certified, fiberglass-free as of 2024, and ultra-low VOC. Here's what each certification proves, what it doesn't, and how Lull stacks up against safer-still options like GREENGUARD Gold.
No, Lull mattresses are not toxic. Every mattress Lull currently sells uses CertiPUR-US certified foams, is fiberglass-free (Lull removed fiberglass from production in 2024), and is rated ultra-low VOC. None of that makes Lull the cleanest mattress on the market - for that you want GREENGUARD Gold or organic-certified beds - but it does put Lull comfortably above the safety floor that matters for indoor air quality and chronic exposure.
This guide explains exactly what each certification proves, what it does not cover, and how Lull compares to the few mattress brands that go further.
When shoppers ask if a mattress is toxic, they are usually worried about three different things and lumping them together:
Lull's safety story has to be evaluated against all three, not just one.
Every foam layer Lull ships is CertiPUR-US certified. The program is run by an independent body and tests finished foam samples - not raw chemicals or full mattresses - for:
That last bullet is the one that matters for off-gassing. 0.5 ppm is the cap; many CertiPUR-US foams test well below it, and Lull markets its current lineup as ultra-low VOC, which is the brand's way of saying it tests below the 0.5 ppm threshold.
What CertiPUR-US does not cover: covers, fire socks, adhesives, or the rest of the mattress assembly. So a CertiPUR-US badge tells you the foam is clean. It tells you nothing about the fire barrier - which is why fiberglass became such a flashpoint in the bed-in-a-box category to begin with.
For years, Lull (and most low-cost foam mattresses sold online) used a fiberglass fire sock under the cover to pass the federal flammability standard 16 CFR 1633 without expensive chemical flame retardants. The fiberglass itself is sealed inside the inner cover and is harmless during normal use. The risk is consumer behavior: people who unzipped the outer cover to wash it ruptured the sock, and the resulting fibers are notoriously difficult to remove from a home.
In 2024, Lull updated its construction and removed fiberglass from its mattresses entirely. Lull's current sustainability page confirms its mattresses are made without flame retardant chemicals and without fiberglass. Newer reviews (Reader's Digest, Feb 2026; CNET, 2024) also confirm the fiberglass-free build.
Two important caveats:
Every foam mattress arrives compressed and sealed in plastic. When you open it, trapped air escapes and you'll smell a faint chemical odor for 24 to 72 hours. That smell is not the same as toxicity - it is a mix of styrene-butadiene residues and packaging plasticizers, and Consumer Reports' November 2025 testing on bed-in-a-box mattresses found that even at peak off-gas, levels in a typical bedroom drop well below health thresholds within days.
To speed it up:
CertiPUR-US is the industry's most common safety standard, but it is not the strictest. Here is how the major certifications stack up for shoppers who want extra peace of mind:
CertiPUR-US - covers foam content + VOC emissions ≤0.5 ppm. Lull holds it on all models.
GREENGUARD Gold - covers whole-product VOC emissions, designed for sensitive populations including children. Stricter than CertiPUR-US. Only the Lull Original sold via Pottery Barn Kids carries this certification; standard Lull.com mattresses do not.
OEKO-TEX Standard 100 - covers textile chemical safety (cover, fabrics). Different scope. Lull does not hold it.
GOLS / GOTS - material-level organic certification for latex / cotton. Lull is not an organic brand and does not hold these.
If your priority is lowest-possible VOC exposure for a child's room, the GREENGUARD Gold version of the Lull Original (Pottery Barn Kids exclusive) or a brand like Avocado or Naturepedic is a stronger fit. For adult bedrooms, CertiPUR-US plus ultra-low VOC is the level most sleep-health experts treat as sufficient.
Lull Original - 10" all-foam, three layers:
Lull Original Premium - 12" all-foam with a thicker comfort layer and added cooling cover.
Lull Luxe Hybrid - 12" hybrid:
All layers are CertiPUR-US certified, all current builds are fiberglass-free.
For most adult shoppers, yes - Lull clears the meaningful safety bars: certified-clean foams, no fiberglass, low measurable VOCs. The trade-offs are about feel and durability (medium-firm, ~7-year useful life for the all-foam models), not toxicity.
Skip Lull if any of these apply:
For everyone else, Lull's safety profile in 2026 is solid, and the 2024 fiberglass removal closed the one legitimate complaint that used to dog the brand.
Lull Sustainability page - current materials and certifications
CertiPUR-US Directory - Lull foam supplier listings
Consumer Reports - VOCs and Toxic Chemicals in Mattresses (Nov 2025)
Yes - all foam layers in every current Lull model are CertiPUR-US certified, meaning they are made without PBDE flame retardants, heavy metals, formaldehyde, ozone depleters, or regulated phthalates, and emit under 0.5 ppm of VOCs.
No. Lull removed fiberglass from its mattresses in 2024. Mattresses manufactured before that changeover do contain a fiberglass fire sock - it is sealed and safe during normal use, but you should not unzip the cover.
No. CertiPUR-US explicitly prohibits formaldehyde in the foams, and Lull only ships CertiPUR-US certified foam.
Only the Lull Original sold through Pottery Barn Kids. The mattresses sold on Lull.com are CertiPUR-US and ultra-low VOC, but not GREENGUARD Gold.
Ventilate the bedroom for at least 24 hours before sleeping on it. People with asthma or chemical sensitivities should ventilate for up to a week before regular use.
Yes - GREENGUARD Gold and certified-organic mattresses (Avocado, Naturepedic, Saatva Latex Hybrid) hold tighter chemical-emission certifications, at higher prices.
Written by
Banner Mattress EditorialThe Banner Mattress editorial team publishes independent mattress reviews, buying guides, and sleep-health advice. Since 2018 we've tested 1,000+ mattresses and 3,000+ pillows, sheets, and bedding accessories in our review lab - every recommendation is hands-on, never sourced from vendor talking points. Affiliate links may earn us a commission, but never change what we recommend.
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